I have a promise for an object and would like to get a promise for a property of that object. How should I do that?
var user = Q.nfcall(User.findOne, {
_id: userId
});
var accessToken = Q.Promise(function (resolve, reject) {
user.then(function (user) {
if (!user) return reject(new Error('User not found.'));
if (!user.github.accessToken) return reject(new Error('Access token not found.'));
return resolve(user.github.accessToken);
}, function(err) {
return reject(err);
});
});
This is what I tried so far, but I'm not sure if its the best (or most correct) way.